Improvement in rotary pumps



NAPErERs, PHOTO-L THOGRAPHER WASHINGTUN D c HENRYW. MA'THER,

or New YoRK, Y.

Leum Pagen: No. 102,140, dated aprilie, i870.

IMPROVEMENT IN ROTARY PUMPS.

. The Schedule referred to in these Letters Patent and making part of the sarna.

I, HENRY W. MATHER, of New York, in the county and State of New York, have invented a new and improved Rotary Pump, of which thel following is a specjcation.

Myinvention belongs to that class in which a series of iloats `or` buckets, carried by a revolving hub vwithin a cylindrical case, are adjusted to occupy the W water-passage during the 'greater portion of their l revolution, andV withdrawn therefrom to pass the but` ment; and

I t consists inthe enlargement of' the inner circum-i ference of the cylindrical case at that point',in the revolution ofthe floats at which their retraction com# nienees, andin combination therewith of a central cam for vmoving the floats into the water-way and reti-acting them at the proper time, together with a supplementary cam to be used in case of the first becoming inoperative, and in the combination and arrangement of the other operating parts with these featnres, and also in the pocket or chamber for the receptiouof sticks, stones, 87e., when the pump is used as a motor.

Figure 1 represents" the pump with one side of the case, and also of the revolving hub removed.

Fgure2 shows the interior of the case with the working parts of the pump removed.

`Figure 3 is avertica-l section of the whole, on the line :v :n of fig. 1. i

In the drawings- Ais the case; B, the spindle;A and v 0, the hub which revolves therewith.

This hub is a hollow chamber, within which the link-connections D D of the ilo-ats E E E E- operate.

The' floats project transversely through slots inthe sides of the hub, and are of a width suilicient to fill the water-space between the two sides of the case, as seen in tig. 3, but. the links are of lessthickness so as to occupy the chamber within the .hub and slide freely wthoutfrictioh.

Fis the induction, and G the eduction-openings, and` H the water-passage of the cylindrical case, in which the body of water is forced along in the direc- 'tio'n of the arrows by the floats, which act as pistons.

Projecting from the inner sides offthecase, or otherwise suitably situated to accomplish-.the purpose, are cams I I, against the edge of which travel pins or friction-rollers,` "attached to the iloats, Aimparting thereto such an eccentric motion as to, cause the lloats to project from the hub so as to traverse the water-passage H during about half the revolution,

and then, aided by their gravity, as will presently be explained, retract them successively at the butment K so as to passitwithout friction. y

Areeess is formed in the case at L, at that point in the revolution at which the float begins its retractivemovement, which serves to relieve iupart from the pressure of the column of water the float acted on by the cam, and allow it to move more freely, the pressure being thereby made to fall ou the float next following, or divided between the two. y

The retractive movement begins as the float ap proaches an inclinatio of forty-five degrees, so that the operation of the cani is aided by gravity to pro- 4duce that movement, thereby economizing the power employed.

Friction-rollers ffaie placed at those points of the hub most subjectto friction from the sliding floats, which also reduces the resistance.

An auxiliary-cam, I', is provided ou the sides of the case A, outside of the circuit traversed bythe extremity of the lloats, which acts as a guide and bearing for them in the ordinary operation of the pump, and also serves the purpose of a'snbstitute device for actuating the floats in case of their failure to advanceand retract in the water-passage H through the breakage or ultimate wear of the pins, and friction,- rollers J J, in which case the raised shoulder' I performs the ofce of the cams I I in an eiii'cient andv reliable manuel'. y

The` pump may be constructed to operate by this means alone, and the use of the cams I I wholly dise pensed with if desired. v

This pump is adapted to be used as a motor as well as for forcing water, and for such use `a pocket, M, is provided in the case to receive any stick, stones, or other obstructions which might enter the induction with the water.

The construction and arrangement are such as to forman eiective, durable, and easy-working pump.

I claim as my invention- 1. The recess L in the inner circumference of the case A, for relieving the floats from the pressure of water while being retracted by the cams I I.

` 2. The cam I', as an auxiliary means of retracting the floats E E', in combination with the case A, recess L, and butmen't K, as set forth.

3. The pocket M, below the water-passage H and continuous thereof, forming a'chamber near the induction-pipe, as and for the purpose set forth.

4. A rotary pump, consisting of the cylindrical case A, with *eccentric peripheryL, cams I I, and supplemeutary cam I', with concentric revolving cylinder C and floats E E', combined, arranged, and .operating substantially as'set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HENRY W. MATHER. W'itnesses J ONA. AUSTIN, KATE N. Jonas. 

